Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4a3d1adfde32475188577e7de6c27ec752063fc2bcaa4f6f7cee0d4a60ac459' 
  AND token = 'P1t9ioIXnd8pFF9P/vwB92/ASw3dmzYJD0eXRsb6vws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}